Sigma SD1: the Foveon sensor at an altitude of 46 Mp
Sigma, one of the leading manufacturers of optical universal wants at all costs to gain a leading position in the competitive and difficult field of digital SLR cameras. Designing and building digital sensors is not an easy firearm Sigma is the relentless development of the Foveon X3 sensor, a project carried out for many years with varying fortune, and who is today taking a major leap in quality going from 4.7 × 3 MP resolution current (Sigma SD14 and SD15) to 15.3 × 3 Mp well distributed on APS-C.
The unusual definition of the numerical resolution of the Foveon is the fact that both consists of three layers, each sensitive to one of the primary colors and with 15.3 megapixels available, unlike the current sensors that use a single layer with the interposition a Bayer filter for the correct registration of color information (demosaicing). This would result in a better sensor response especially in the range of green (the spectral component of increased sensitivity for human vision) resulting in a high yield of image definition and detail, real strength of the Foveon sensor….
Very interesting comparison between images taken with the Foveon sensor and those taken with traditional sensor Bayer filter (click on link). In practical terms, according to the calculations of the producer and the resolving power of the new Foveon should be equivalent to approx. 30 Mp sensor digital 46 Mp as traditional and non-math would suggest, a remarkable achievement in any case. The Sigma team seems very motivated to achieve targets but there is still some way to go in terms of development of the image processor, the TRUE II in this case, which is essential to exploit the intrinsic characteristics of any sensor digital. The new Foveon X3 sensor equip the digital SLR Sigma SD1, the future top model in the pipeline for 2011
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